Crushing mill concave holding means



Nov. 8 1932. H. H. RUMPEL GRUSHING MILL CONCAVE HOLDING MEANS Filed Oct.9. 1928 m m m ATTORNEYS.

Patented Nov. 8, 1932 Lasers HARVEY In. numrnngor M LwAuKE-n, Wisconsin,nssrenon T0 SMITH ENGINEERING WORKS, or MILW'AUKEE, wrsoonsru, Aconronnraon or WISCONSIN cnusrrine Minn concern HOLDING MEANS V 7Application filed October '9, 1928. Serial 'No. 311,346.

This invention relates to improvements in crushing mill concave holdingmeans.

It'is'one of the objects of the present invention to provide a crushingmill concave holding means in which the concave member is connected toits support in a manner to firmly hold the concave member in positionand to permit its easy removal in case of breakage orrepa'ir.

A further object of the invention is to provide a. crushing mill concavemember having means for yieldingly holding the concave member in workingposition. i

A further object of the invention is to provide a crushing millconcav'eholding means which is of simple construction, is strong and durable,and is well adapted for the purpose described; 1 v I With the above andother objects in view theinvention consists ofthe improved crushing millconc-aveliolding means and its parts and combinations asset forth in theclaims, and all equivalents thereof.

ln the accompanying drawing in which the same reference charactersindicate the same parts inall of the views: 7 Fig. 1 is-a verticalcentral sectional view'of the upper portion of acrushing mill providedwith the improved concave holding means;

Fig. 2 is a'transverse sectional detail view thereof taken on line 22 ofFig. 1; and

Fig. 3 isa top view of the concave grinding i'member removed from themill.

Referring to the drawing, the reference jnumeralc indicates a lowerframe or casing jwhich'is of cylindrical form and is provided "with an"upper and outwardly extending flang'e '6. A crusher shaft *8'eccentrically journaled in a sleeve shaft 9is provided with acrushe'rhead '10 at its upper end. A-cap 11 holds the head in positionon the shaft 8.

Anfupper housing or frame 12 is formed with an annular rounded flange l8whichextends over and engages the upper rounded 'fla'nge'6 ofthemainframe. Bolts l kextend downwardly through both flanges 6 and 13 and areencircled by coiled springs 15 which iyieldingly hold the upper housingin posi- "tion. Pins 16andsprings 15 also assist in parts, andtransversebolts 18 extend through radial lugs 18 formed on the splitportions to draw the two parts into clam ingen ageinent withtlie upperor concave frame inember 19 around which it extends. The portion of theconcave member surrounded by the I housing is of cylindrical form, andis provided with an inwardly extending annular flange 20 for receivingsegmental shims which are placed at spaced intervals around the flangeand between the flange and the housing to net the height of the concavemember with relation to the ;crusher head 10. Bolts 22 a'dj'u-sta-blysupport the weight of the concave fframe member 19, and pins 28 serve asguides to hold the partsin engagemen't. Said bolts and pins arepositioned in the space between the end portions of the shims.-

An outer or concave crushing member '24 surrounds the crusher head 10 inspaced relationand is secured toithe inner concave porformed in theconcave member portion 19. Thecontacting face portionsofth'e parts 19and 2e are ground or machined to space the lugs 26 from the wallso'fth'e recesses and said spaces are filled with flat pieces of wood 28or other easily compressible material, as wood,

to permit-'dra wing th'e bolts tight in the event that the zinc packingmaterial 29, which is poured between the concave' meniber r and theirame' while in a molten "state, should give way.

The lower'por tijon of the concave member '19 is provided'with an apron30 having a yielding packingring 3 1 mounted-on its out er side whichbearsfaga inst the inner wall ofi the casing 5 to slidinglysealitherconnection 'tliereb'etween. The upper inner portion of the concaveflange member 20 is provided with an upstanding collar 32 against whichighe inner upper edges of the concave housing ear.

A cylindrical support and feed spout 83 is connected to the upperportion of the concave frame member 19 and the collar 32 and extendsupwardly therefrom to direct the material into the space between theconcave 24 and the crusher head 10. All spaces between parts where dustor crushed material may gather are filled with Zinc rubber or otherpacking material 34 to protect said parts.

As the concave crushing member is completelybacked'and reinforced bytheconcave frame member, a comparatively thin concave member may be used.Furthermore, the bolted suspension of the concave member permits easyremoval and replacement of the concave member when worn. And stillfurther the yielding connection between the concave frame member and thelower frame eliminates undue strain being borne by the concave member.The extension of the lugs of the concave member into the recesses holdsthe concave members in position and relieves the holding bolts of anyturning strain which might be present. From the foregoing description itwill be seen that the crushing mill concave holding means is of verysimple construction and is well adapted for the purpose described.

That I claim as my invention is:

1. In a crusher mill having a gyratory crusher head, a concave holdingmeans therefor, comprising a support extending around the crusherheadand having a concave portion provided with recesses and openings, aconcave crushing member extending around the head and intimatelyengaging the support and having projecting portions which extend intothe recesses and adjacent the openings, and bolts connected to theprojecting portions and extending through the openings for firmlyattaching the concave member to the projecting lugs which extend intothe recesses and adjacent the side openings, and bolts extending throughthe lugs and the openings for firmly attaching the concave member to theframe, the extension of the lugs into the recesses relieving the boltsof rotary strain of the concave member. I

3. A crusher, comprising a frame having a concave portion providedwith'recesses in its sides which have openings extending therethrough, agyratory crusher head extending into the concave portion, a concavecrushing member extending around the crusher head and engaging theconcave portion of the frame and having horizontally projecting lugswhich extend into the recesses, said lugs having openings which are inregister with the openings of the frame, and bolts extending verticallythrough the openings of the lugs and the recessed portions of the framefor firmly attaching the concave member to the concave portion of thesupporting frame, said lugs relieving the, bolts of rotary strain of theconcave member.

4. A crusher, comprising a frame having a concave portion provided withrecesses in its sides which have openings extending therethrough, agyratory crusher head extending into the concave portion, a concavecrushing member extending around the crusher head and having outwardlyprojecting lugs which extend into the recesses, said lugs havingopenings which are in register with the openings of the frame, pieces ofyielding material interposed between the lugs and the lower surfaces ofthe recessed portions of the frame, and bolts extending through theopenings of the lugs and the recessed portions and through theinterposed pieces of material for attaching the concave member to theconcave portion of the supporting frame. 7

5. A crusher, comprising a lower frame having an upper rounded edge, anupper frame having an annular groove in its lower edge portion intowhich the rounded edge of the lower frame extends, means yieldinglyholding the two frames together, an inner frame extending into the upperframe and having a concave inner portion provided with recesses in itssides, a gyratory crusher member extending into the concave portion, aconcave crushing member extending around the crusher head and havingoutwardly projecting lugs which extend into the recesses,

said lugs having openings which are in register with the openings of theframe, pieces of yielding material interposed between the lugs and thelower surfaces of the recessed portions of the frame, bolts extendingthrough the openings of the lugs and the recessed portions of the innerframe, and a binding metal interposed in a fluid state between theconcave member and the concave portion of the inner frame.

6. A crusher, comprising a frame having a concave portion provided withrecesses in its sides which have openings extending therethrough, agyratory crusher head ex tending into the concave portion, a concave,

crushing member extending around the crusher head and having outwardlyprojecting lugs which extend into the recesses, said lugs havingopenings which are in register with the openings of the frame, pieces ofyielding material interposed between the lugs and the lower surfaces ofthe recessed portions of the frame, bolts extending through the openingsof the lugs and the recessed portions and through the interposed piecesof material for attaching the concave member to the concave portion ofthe supporting frame, and a binding metal interposed in a fluid statebetween the concave member and the concave portion of the inner frame.

7. In a crusher, a frame, a concave supported by said frame andhavingrecesses in its side portions and openings communicating with saidrecesses, a gyratory crusher head extending into said concave, a concaveliner interposed between said head and said concave and having directengagement with the lower portion of said concave, said liner havingoutwardly proj ecting lugs extending into said recesses, bolts passingthrough said openings and said lugs for firmly holding said liner withinsaid concave, and filler metal interposed between said liner and saidconcave and between said lugs and the walls of said recesses, saidimetalproviding a backing for said liner against said concave remote from saiddirect engagement for relieving said holding bolts from rotary strain.

In testimony whereof, I afiix my signature,

HARVEY H. RUMPEL-

